dt-bindings: power: Add missing rpmpd smd performance level

The RPM_SMD_LEVEL_TURBO_HIGH is used by MSM8956/8976 and APQ variants:
add the definition.
Signed-off-by: Angelo G. Del Regno <kholk11@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

include/dt-bindings/power/qcom-rpmpd.h

@@ -68,6 +68,7 @@
 #define RPM_SMD_LEVEL_NOM_PLUS        320
 #define RPM_SMD_LEVEL_TURBO           384
 #define RPM_SMD_LEVEL_TURBO_NO_CPR    416
+#define RPM_SMD_LEVEL_TURBO_HIGH      448
 #define RPM_SMD_LEVEL_BINNING         512
 
 #endif